Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 121 | 106 | 114 | 136 | 146 | 136 |
Tmin | 121 | 110 | 118 | 139 | 152 | 147 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 121 | 114 | 127 | 148 | 165 | 152 |
Humidity/Visibility | 90 | 80 | 86 | 101 | 112 | 104 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 144 | 144 | 144 | 146 | 147 | 150 |
Tmin | 146 | 152 | 145 | 147 | 148 | 151 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 160 | 159 | 155 | 157 | 152 | 163 |
Humidity/Visibility | 109 | 109 | 108 | 109 | 110 | 111 |
Climate data is usually derived from meteorological data of a certain number of years. The actual number of recorded years may vary from only a couple to 50 years or more. The quality of climate data depends on the number of available recorded years. Fewer years means less reliable data. The standart-period for reliable climate data is 30 years. For example, the mean monthly temperature for, let's say January, would ideally calculated from a total number of 930 recorded January-days. However, the usual number of recorded days is much smaller. The table above shows the actual number of recorded days for every parameter measured. |